Loom filling motion



Filed NOV. 16, 1945 Patented Sept. 23, 1947 LOOM FILLING MOTION Harold llloeber, South Dartmouth, Mass.; Barbara 0. W. Hoeber and William T. Read, as executors of said Harold Hoeber, deceased, assignors to Textile Research Co., a corporation of Massachusetts Application November 16, 194.5, Serial No. 629,112

9 Claims'. l

This invention relates to a loom, more particularly to the lling motion,

Looms are usually provided with means for detecting the presence of the filling so that should the filling be absent the loom will automatically stop. This detecting mechanism comprises an operating member driven from a cam on a cam shaft and so arranged that the filling will trip a latch which otherwise would be engaged by a catch and cause actuation of the filling motion finger. At high speeds the lling cam follower which is moved by the cam may have sufficient inertia so that it will not follow the cam closely and accurately, especially just after the high point of the cam moves from beneath the follower.

One of the objects of this invention is to cause the filling cam follower to follow the cam closely during its entire movement.

Another object of this invention is to provide pressure means on the cam follower at only the portion of the stroke of thefollower when the cam follower might leave the cam. 4

Another object of this invention is to leave the cam follower free for its normal action Without restriction of springs or other devices during the major part of its operating movement but to apply some pressure to the cam follower at and just following the movement of the follower as a result of the high point of the cam moving beneath the follower.

With these and other objects in View, the invention consists of certain novel features of construction, as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings:

Fig. 1 is a sectional view looking toward the lefthand side frame of the loom and showing a fragmental part of the loom suiicient for illustrating the invention here shown;

Fig. 2 is a sectional view on substantially line 2-2 of Fig. 1;

Fig. 3 is a perspective View of the pressure means for engaging the cam follower and illustrating fragmentally parts of the loom associated therewith.

In proceeding with this invention I mount above and in the path of movement of the cam follower an arm having a shoe at its end which will be engaged by the cam follower adjacent the upper end of its stroke. A spring actuates this arm tending to press the arm and the cam follower which it engages downwardly and thus forces the cam follower downwardly during the upper part of its swinging stroke.

With reference to the drawings, the left-hand Irs fragmental portion of the side frame of the loom is designated generally I Il which has a breast beam I I mounted at its forward end and which supports the cam shaft I2 upon which the cam I4 is Xedly mounted. The cam follower I5 is pivotally mounted at an elbow portion on a bushing I 'i secured to the loom frame by bolt I6 and has a shoe Il adjustably mounted as at I8 at one end. The follower dog I9 is secured as at 20 on the other end of the cam follower I5 on the opposite side of the pivot bushing I6 which in turn has the filling cam follower trip 2| secured thereon as well as the filling motion hook 22. The filling fork 23 is mounted in holder 24 pivoted as at 25 and has a hook or latch 26 to engage the catch 2l in` the event that it is not moved out of the way by the lling 28 which is shown spaced above the lay 29 and in front of the filling fork grate 3U secured on the lay. The filling fork slide is designated 32 and has mounted on it the lling motion trip 33 all of which will move forwardly on the filling motion stand 34 so that the trip 33 will engage the filling motion finger 35 mounted on the starting rod and cause the loom to stop.

At high speeds the rotation of cam I4 will be very rapid and the arm or follower I5 will be moving up and down very rapidly in response to the movement of the cam. In some cases the inertia of the follower I5 will prevent the shoe lI'I from being in contact with the cam I4 just after its high point has been passed and accordingly I have provided a means to ycause this follower to press downwardly onto the cam surface during this portion of its stroke.

In order to accomplish this I have provided a bracket having slots 4I therein for the reception of bolts 42 for mounting the same on the frame I0. This bracket is L-shaped extending outwardly from the frame as at 43 (see Fig. 3) and is provided with a channel 44 in its under surface for the reception of the tongue of a member 45 having depending legs 46 and 41 located on either side of the follower I5 so as to guide the movement of this follower as it swings about its pivot or bearing bushing I6. An arm 48 eX- tends forwardly from member 45 and carries a shaft 49 in the bearing portion 50 thereof by reason of nuts 5I and 52 positioned on either side of the bearing. A hub 53 is secured on the end of this shaft 49 and carries an arm 54 with a shoe 55. A spring 56 encircling the shaft 49 tends to rotate the shaft 49 counterclockwise as viewed in Fig. 3 to swing the shoe 55 dOWIlWaIdlY. This swinging motion of the shoe 55 is in the plane of movement of the follower I5. The shoe is limited in its downward movement by a stop screw 5'! which is adjustably mounted in the boss 58 on arm 54 and held in adjusted position by the set screw 59. This stop screw engages the guide leg 46 to limit the downward movement of the shoe 55.

The alignment of the shoe 55, so that it will be positioned in the plane of movement of the follower I5, is accomplished by movement of the leave the cam is overcome by this follower I5 picking up shoe 55 near the upper portion of the movement of the follower as shownin dotted lines in Fig. 1 and thus the pressure of the spring 56 will be applied tothe follower I5 during this upper portion of its movement so that after it passes over the high point of the cam it will be forced by the spring 56 downwardly into engagement with the cam so that a close control of the movement of the follower will be had.

By this arrangement the follower does not work against any spring pressure during the major portion of its movement and is controlled only during that portion of its movement where it is liable to getl out of control.

I claim:

1. In a loom, a cam shaft, a filling cam thereon, a lling cam follower, means for pivotally mounting said follower to swing in response to the movement of said cam, and means to apply pressure to said follower during a portion only of its swing about its pivotal mounting.

2. In a loom as set forth in claim 1 wherein said means is independent of and detached from said follower during a portion of its swinging movement.

3. In a loom as set forth in claim 1 wherein saidV means is detached from but picked up by said follower during the movement of said follower along the portion of the cam at the greatest distance from said shaft.

4. In a loom as set forth in claim 1 wherein said means is disengaged from said follower during the movement of the follower along the portion of the cam nearest the shaft center and is engaged by the follower along the portion of the cam at the greatest distance from said shaft.

5. In a loom as set forth in claiIn 1 wherein said means comprises an arm pivoted to extend into the path of movement of said follower and a stop to limit its movement in one direction.

6. In a loom as Set forth in claim 1 wherein said means comprises an arm pivoted to extend into the path of movement of said follower and a stop to limit its movement in one direction and a spring to urge said arm against said stop but permit said arm to yield as said follower engages the arm to move it in the opposite direction.

7. In a loom as set forth in claim 1 wherein guides are provided on either side of said follower.

8. In a loom, a'cam shaft, a filling cam thereon, a filling cam follower, means for pivotally mounting said follower toA swing in response to the movement of said camA and guides on either side of said follower at a position intermediate the pivotal mounting and said cam and nearer to the cam than to said pivotal mounting.

9. In a loom, a-cam shaft, a filling cam thereon, a filling cam follower, .means for pivotally mounting said follower to swing in response to the movement of said cam and guides on either side of said follower at a position intermediate the pivotal mounting and said cam comprising spaced members on either side of said follower and nearer to the cam than tosaid pivotal mounting.

HAROLD HOEBER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name- Date 138,987 Barnes May 20, 1873 2,020,700 Pool Nov. 12, 1935 2,383,931 Brown Sept. 4, 1945 

